package com.ruoyi.web.controller.common;

import com.google.code.kaptcha.Producer;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.CacheConstants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.core.redis.RedisCache;
import com.ruoyi.common.utils.sign.Base64;
import com.ruoyi.common.utils.uuid.IdUtils;
import com.ruoyi.system.service.ISysConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

/**
 * 验证码操作处理
 *
 * @author ruoyi
 */
@RestController
public class CaptchaController {
    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

    @Autowired
    private RedisCache redisCache;
    @Autowired
    private ISysConfigService sysConfigService;

    /**
     * 生成验证码
     */
    @GetMapping("/captchaImage")
    public AjaxResult<Object> getCode(HttpServletResponse response) throws IOException {
        Map<String, Object> capthMap = new HashMap<>();
        // 生成验证码
        String captchaType = RuoYiConfig.getCaptchaType();
        if (!sysConfigService.selectCaptchaOnOff()) {
            capthMap.put("captchaOnOff", false);
            return AjaxResult.success(capthMap);
        } else {
            capthMap.put("captchaOnOff", true);
        }

        // 保存验证码信息
        String uuid = IdUtils.simpleUUID();

        String capStr = null, code = null;
        BufferedImage image = null;

        // 生成验证码
        if ("math".equals(captchaType)) {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);
        } else if ("char".equals(captchaType)) {
            capStr = code = captchaProducer.createText();
            image = captchaProducer.createImage(capStr);
        }

        redisCache.setCacheMapValue(CacheConstants.CAPTCHA_CODE_KEY, uuid, code);
        redisCache.setMapExpireTime(CacheConstants.CAPTCHA_CODE_KEY, uuid, 60);
        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try {
            ImageIO.write(image, "jpg", os);
        } catch (IOException e) {
            return AjaxResult.error(e.getMessage());
        }
        capthMap.put("uuid", uuid);
        capthMap.put("img", Base64.encode(os.toByteArray()));
        return AjaxResult.success(capthMap);
    }
}
